Improvement in laying cement pipes



1. LOEFFLER.

Laying Cement Pipes.

P10152564, v PatentedJune 30,1874.

WITNESSES ATTORNEYS; V

UNITED S'ra'rns PATENT Orrro.

JACOB LOEFFLER, or new YORK, N. Y.

IMPROVEMENT IN LAYING CEMENT PIPES.

Specification forming part of Letters Patent No. 152,564" dated June 30,1J4 application filed May 29, 1874.

To all whom it may concern:

Be it known that 1, Jacon LOEFFLER, of the city, county, and State ofNew York, have invented a new and useful Improvement in Laying CementPipes, of which the following is a specification:

I11 the accompanying drawing, Figure 1 represents a verticallongitudinal section of my improved inoldingflask for layingcementpipes, taken on the line 0 c, Fig. 2. Fig. 2 is an end view of theflask; Fig. 3, a vertical transverse section of the same on the line a;00 of Fig. 1; and Fig. 4, a longitudinal section of thepipes,showingconnectingjoint of the same.

Similar letters of reference indicate correspondingparts.

The object of my invention is to provide a cheap, substantial, and rapidmode of laying cement pipes of all sizes for water, gas, drainage, andother purposes, so that a continuous and solid pipe maybe constructeddirectly on the ground, dispensing with special places of production andloss of breakage by shipment, and preventing, also, by the moreexpeditious laying, a great deal of the annoyance and in convenienceexperienced in large cities by the cuttin g up of the streets. Myinvention consists of a molding-flask, constructed of detachableexterior sections, suitably supported on the ground, andcccentrieally-adjustable coresections, which are flanged in such amanner that an overlapping joint of the pipe-sections is produced asthey are formed consecutively, one after the other. The core-sectionsare withdrawn from the finished pipe-sections, by contracting them, bymeans of a central shaft and cam-eccentrics.

In the drawing, A represents a moldingflask, made of circular, oval, orother suitable shape and desirable size. It is constructed of twoexterior sections, B, made of sheet-iron walls, with longitudinal andcircumferential strengthening-strips, and with a longitudinal topopening and funnel shaped spout, B, formed by inclined flanges a of itssection B, and an interior core, G. The lower part of the outer sectionB does not extend concentrically aroundthe core 0, but is flanged"sidewise and symmetrically to the longitudinal axis in downwarddirection, so thatthe longitudinal side strips 7) formed thereby, whenprovided with pointed spurs or other steadying devices, support theexterior sections or shell. Hinged and slot-ted catch plates (1, at theupper part, near the ends of one section B, lock over projecting lugs clof the other sec tion, for binding both sections firmly together.

An y other connecting device maybe used for the outer sections,spring-hook, and catchhook and eye, ac, as may befound most efficient inpractice.

The core 0 consists of two adjustable sections, 0, which are constructedin similar manner as the outer sections, concentrically thereto, toproduce a uniform thickness of the pipe. The core sections 0 are joinedhorizontally, the upper section being somewhat eccentrical to the lowersection, and of slightly smaller size, with sidewise-extending flanges eprojecting over the lower section. The lower section is made in similarmanner of quadrantal sections, with slight eccentricity, for the purposeof being adjusted by a central shaft, f, turning in suitable bearings fof the lower section, and acting by cams f on projecting lugs c at theouter side of end walls of the upper and lower sections. The pressure ofthe cams on the lugs forces the core-sections firmly against theexterior sections, so as to expand accurately into concentric shapetherewith.

B y releasing the cam-shaft the coresections are contracted, which isassisted in the lower sections by suitable springs 71, coneoting thequadrantal parts thereof.

The core-sections are provided with detachable flanges 17 at both ends,for the first section, when the pipe is intended to be laidsimultaneously in opposite directions; while, for the ordinary working,one end flange only is required for determining the exact position ofthe outer sections,the opposite projecting end being fitted into thefinished pipe-section.

The cement is mixed, near the place of work, in any suitable proportion,according to the strength and resistance of the pipe under the additionof sand and broken stones, one part of cement, one part of sand, andthree parts of broken stones forming a good working mixture. The same isfilled into the flask, through the top funnel, until the whole spacebetween the exterior and core sections is filled up. The ground issufficiently leveled before laying the flask, and the core supported, atthe outer front end, by a lateral piece of wood, or other suitablesupport.

The bottom flanges of the outer sections guide the cement or btondirectly on the ground, and form a broad base, on which the pipe-sectionis firmly supported. When the pipe is sufiieiently dry and firm theouter sections are first taken oft, and then the crosssectionscontracted and drawn out at the forward end. The next pipe-section isjoined to the preceding one, as indicated in Fig.4, by puttin o up thecore and exterior part of the flask in connection with the finishedpipe-section, and filling up with cement, so as to produce an intimateoverlapping joint of the pipe-sections, and thus a strong and continuouspipe.

Pipes for difi'erent purposes may, in. this manner, be laid with greatrapidity, and the excavations may be filled up as soon as a certainlength of the same is completed, produ'cing thus, without loss ofmaterial and time, superior and less expensive pipe.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. The moldingflask for laying continuous cement pipesdirectly on the ground, consisting of connected exterior sections, withentrance-funnel and open base part,con1binedwith theconcentrically-adjustable and detachable coresoetions, constructedsubstantially in the manner set forth.

2. The core 0 of the nioldingflask,composed of lower sections withadjustable quadrantal parts, and upper section, provided with projectinglugs and cam shaft for producing the expansion and contraction of thesame, as required, substantially in the manner specified.

\Yitnesses: JACOB LOEFFLER.

T. B. Mosnnn, ALEX. F. ROBERTS.

